Correlation of volcanic rocks in Santa Cruz County, Arizona

Volcanic, Stratigraphy, Correlation, Geochemical Survey, Montana Peak fm - Oligocene, Ruby Road fm, [Oro Blanco conglomerate][Oro Blanco fm] - Cretaceous(?)/Jurassic(?), tuff of Pajarito(Pajarito lavas) - strata of Cobre Ridge - Jurassic - Fresnal Canyon sequence,